Applying program theory development to a study of restorative practices in Victorian schools Abstract Restorative justice principles and practices are beginning to consolidate as an area interest and reform in schools. While there is enthusiasm for a philosophy that focuses on problem solving and repair of damaged relationships following an incident or crime, this is tempered by hesitation about how restorative justice works, its impact and how it is measured. This study investigates the context and conditions in which restorative practices were introduced in eighteen Victorian schools. Drawing on the literature to identify relevant theories and assumptions, together with findings from interviews and surveys a draft program theory for restorative practices in schools was developed. Questions about program interpretation, quality and delivery were investigated to comment more specifically on the causal links between program activities and intended outcomes. The findings from this study show that while the school environment is well suited to introduce restorative practices this is juxtaposed against a number of challenges. In some schools, restorative practices represented a fundamental shift in thinking about notions of justice and discipline. Lack of clarity in program implementation also suggests the need to progress thinking about the operational factors that contribute to the effective use of restorative practices. Program theory development has been used successfully as a clarificative evaluation approach to plan the logical and progressive introduction of similar interventions in other social settings. The use of program theory development for interventions such as restorative practices is timely, as higher standards of reporting and accountability for student engagement, retention as well as student learning are expected from school councils and administrators. This also comes at a time when the relationship between student well-being and curriculum outcomes is coming under scrutiny, as teachers and administrators look more closely at discipline regimes. Gary Shaw